Hot Rolled Steel Round Bar 6mm-150mm
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- -
- Supply Capability:
- 100000 m.t./month
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Specifications of Chinese Standard Round Bar
1. Grade: Q195, Q235, Q345
2. Diameter: 6mm-150mm
3. Length: 6m, 9m, 12m or as customer’s request
4. Tolerance: Within ±5% for weight; ±2mm for diameter
5. Note: The price can be better is the quantity is good
6. Chemical composition
Alloy No | Element (%) | ||||
C | Mn | S | P | Si | |
Q195 | 0.06-0.12 | 0.25 | ≤0.05 | ≤0.045 | ≤0.3 |
Q235 | 0.12—0.20 | 0.3—0.7 | ≤0.045 | ≤0.045 | ≤0.3 |
Q345 | ≤0.2 | 1.00-1.60 | ≤0.045 | ≤0.045 | ≤0.55 |
Usage and Applications of Chinese Standard Round Bar
1. Chinese standard steel bar is often used where large amounts of steel need to be formed, for example as structural steel.
2. And we can use this kind of product on the performance of the mechanical parts if the demand is not very high.
3. Steel round bar is used in construction and a large number of architectural and engineering structures.
Packaging & Delivery of Chinese Standard Round Bar
Packaging Detail: All goods are packed in bundle with steel strips and shipped by break bulk vessel or container (depend on target market and different ports)
Delivery Detail: 45 days
Trade terms: FOB, CFR, CIF
MOQ: 25 tons per specification; we can negotiate the quantity if the specification is normal or we have stock of one specification.
Weight: The price invoicing on theoretical weight basis or actual weight basis depends on customer’s request.
Shipment: The shipment of bulk break or container is depends on customer’s request and the situation of the port of destination.
Documents given: Full set of original clean on board bill of lading; Original signed commercial invoice; Original packing list; Policy of insurance; Certificate of origin and what the target market needs.
Production Flow of Chinese Standard Round Bar
1. The common processes are preheated forging quenching, dual refinement solution process, cooling quenching and isothermal quenching. We use heat treatment for dual refinement solution process.
2. Material prepare (billet) — heat up — rough rolling — precision rolling — cooling — packing — storage and transportation
Characteristics of Chinese Standard Round Bar
1. The steel in which the main interstitial alloying constituent is carbon in the range of 0.12–2.0%.
2. As the carbon percentage content rises, steel has the ability to become harder and stronger through heat treating; however it becomes less ductile.
3. Quality should be in conformity with the specification of the manufacturer. Quantity and packing conditions should be in conformity with the term in the contract.
4. Regardless of the heat treatment, higher carbon content reduces weld ability. In carbon steels, the higher carbon content lowers the melting point.
- Q: What are the typical hardness values for different grades of steel round bars?
- The typical hardness values for different grades of steel round bars can vary depending on the specific grade and manufacturing process. However, common ranges for hardness values in steel round bars can be between 200 and 400 on the Brinell hardness scale.
- Q: How do steel round bars perform under cyclic loading?
- Steel round bars exhibit excellent performance under cyclic loading due to their high strength and ductility, enabling them to withstand significant stress without deformation or failure. The fatigue characteristics of steel round bars are influenced by various factors, including material composition, heat treatment, and surface finish. Bars with higher tensile strength and hardness demonstrate superior fatigue resistance, enabling them to endure higher stress levels before failure. Cyclic loading subjects steel round bars to stress cycles that induce alternating compression and tension forces. These cycles can initiate and propagate cracks, ultimately leading to failure. However, steel's inherent ductility allows it to absorb energy and redistribute stress, thereby mitigating crack propagation and extending the bar's fatigue life. Fatigue strength assessments typically involve subjecting steel round bars to a specified number of stress cycles until failure occurs. These tests yield valuable information on the bar's endurance limit and fatigue life under different loading conditions. Various techniques, such as shot peening, surface coating, and induction of residual stress, can be employed to enhance the fatigue performance of steel round bars. These techniques introduce compressive stress on the bar's surface, inhibiting crack initiation and propagation, thereby improving fatigue resistance. In summary, steel round bars are reliable and durable when subjected to cyclic loading, making them suitable for applications involving repeated or fluctuating stresses, such as structural components, automotive parts, and machinery components. However, careful consideration of loading conditions, material properties, and design criteria is necessary to ensure optimal performance and longevity when selecting steel round bars.
- Q: What are the differences between the products made of wrought round steel and hot rolled round steel and tested by mechanical testing after heat treatment?
- The longitudinal and transverse properties of the free forging or hammer forgings are relatively small, the banded structure is not obvious, and the plastic inclusions are less deformedIt is not suitable to use rolled material for the workpiece with higher requirement of transverse or tangential performanceSampling position should be the same, usually in accordance with standards or technical requirements, such as vertical performance of a three pull, take at 2/3R
- Q: What is the maximum nickel content allowed for steel round bars?
- The maximum nickel content allowed for steel round bars typically varies depending on the specific grade and industry standards. However, in general, the nickel content in steel round bars is usually limited to around 2-3% to maintain desirable mechanical properties and prevent excessive hardening.
- Q: Can steel round bars be used for making springs or suspension components?
- Certainly, springs or suspension components can be crafted using steel round bars. Steel is extensively employed in such cases owing to its exceptional strength, longevity, and capacity to bear substantial loads. The circular form of these bars facilitates their effortless transformation into diverse spring structures or suspension components. Moreover, steel can undergo heat treatment to enhance its elasticity and resistance against fatigue, both of which are crucial attributes for springs and suspension systems. On the whole, steel round bars present a dependable choice for the production of springs and suspension components that can endure the rigors of these applications.
- Q: What is the difference between a hot-rolled and a peeled steel round bar?
- The production of a hot-rolled steel round bar involves heating a billet or ingot until it reaches a temperature suitable for shaping. The heated steel is then passed through a series of rollers to achieve the desired shape and size. This rolling process results in a bar with a rough surface texture and a slightly rounded edge. In contrast, a peeled steel round bar goes through a different manufacturing process. It is initially hot-rolled to achieve the desired shape and size, similar to the hot-rolled bar. However, after the initial hot rolling, the peeled bar undergoes a mechanical peeling process. This process entails removing the outer layer of the bar to achieve a smooth and shiny surface finish. Additionally, the peeling process contributes to improving the dimensional accuracy and surface quality of the bar. To summarize, the key distinction between a hot-rolled and a peeled steel round bar lies in the surface finish and dimensional accuracy. While a hot-rolled bar possesses a rough surface texture and a slightly rounded edge, a peeled bar exhibits a smooth and shiny surface finish with enhanced dimensional accuracy. The peeling process elevates the overall quality and appearance of the steel round bar, making it more appropriate for applications where aesthetics or precision hold significance.
- Q: What are the maximum allowable stresses for steel round bars?
- The maximum allowable stresses for steel round bars depend on various factors such as the grade of steel, the specific application, and the safety standards being followed. However, a commonly used value for allowable stress in steel round bars is typically around 60,000 to 70,000 pounds per square inch (psi). It is important to consult the appropriate design codes, standards, or engineering specifications to determine the specific maximum allowable stresses for a given steel round bar.
- Q: Can steel round bars be used in the oil and gas industry?
- Indeed, the oil and gas industry finds great utility in steel round bars. These bars find widespread application across various sectors within the industry, encompassing drilling, production, and transportation of oil and gas. Their exceptional durability and high strength render them well-suited for enduring the arduous and demanding conditions typically encountered in this sector. They play a crucial role in the construction of drilling equipment, such as drill collars and drill pipes, along with the production of valves, pumps, and other vital components. Moreover, steel round bars contribute to the fabrication of pipelines and offshore platforms, wherein they provide structural support and guarantee the integrity of the infrastructure. All in all, the oil and gas industry deems steel round bars indispensable due to their robustness, dependability, and capacity to withstand the challenging environments encountered within this sector.
- Q: What is the maximum diameter of a steel round bar?
- The maximum diameter of a steel round bar may differ depending on the specific grade and type of steel utilized. Nonetheless, typically, the diameter of a steel round bar ranges from 1 inch to 12 inches. On a customized order basis, larger diameters might be obtainable. To obtain precise information about the maximum diameter of a steel round bar for a particular grade and type of steel, it is crucial to consult the manufacturer or supplier.
- Q: What are the advantages of using heat-resistant steel round bars?
- There are several advantages of using heat-resistant steel round bars. Firstly, heat-resistant steel round bars are specifically designed to withstand high temperatures without losing their mechanical properties. This means they can maintain their strength and structural integrity even in extreme heat conditions. Secondly, heat-resistant steel round bars have excellent corrosion resistance. This makes them highly durable and suitable for use in environments where they may be exposed to corrosive substances or chemicals. Their resistance to corrosion ensures a longer lifespan and reduces the need for frequent maintenance or replacement. Additionally, heat-resistant steel round bars have superior thermal conductivity. This property allows them to efficiently transfer heat, which can be beneficial in various applications. For example, in industries like power generation or petrochemicals, where heat transfer is crucial, using heat-resistant steel round bars ensures optimal performance and energy efficiency. Furthermore, heat-resistant steel round bars offer excellent dimensional stability. Even when subjected to high temperatures, they maintain their shape and size without warping or deforming. This property is particularly important in applications where precise measurements and tight tolerances are required. Lastly, heat-resistant steel round bars are readily available in various sizes and grades, offering versatility in their applications. They can be used in a wide range of industries such as aerospace, automotive, construction, and manufacturing, where high temperatures are involved. In conclusion, the advantages of using heat-resistant steel round bars include their ability to withstand high temperatures, excellent corrosion resistance, superior thermal conductivity, dimensional stability, and versatility in applications. These benefits make them an ideal choice for industries requiring materials that can perform reliably under extreme heat conditions.
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Hot Rolled Steel Round Bar 6mm-150mm
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- -
- Supply Capability:
- 100000 m.t./month
OKorder Service Pledge
OKorder Financial Service
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